diff --git a/htdocs/langs/en_US/stocks.lang b/htdocs/langs/en_US/stocks.lang
index 7a28c1a0d1d..08992207628 100644
--- a/htdocs/langs/en_US/stocks.lang
+++ b/htdocs/langs/en_US/stocks.lang
@@ -112,6 +112,7 @@ ReplenishmentOrdersDesc=This is list of all opened supplier orders
 Replenishments=Replenishments
 NbOfProductBeforePeriod=Quantity of product %s in stock before selected period (< %s)
 NbOfProductAfterPeriod=Quantity of product %s in stock after selected period (> %s)
+MassMovement=Mass movement
 MassStockMovement=Mass stock movement
 SelectProductInAndOutWareHouse=Select a product, a quantity, a source warehouse and a target warehouse, then click "%s". Once this is done for all required movements, click onto "%s".
 RecordMovement=Record transfert